AIIMS Biology Mock Test - 8


60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Biology Mock Test - 8


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This mock test of AIIMS Biology Mock Test - 8 for NEET helps you for every NEET entrance exam. This contains 60 Multiple Choice Questions for NEET AIIMS Biology Mock Test - 8 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Biology Mock Test - 8 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Biology Mock Test - 8 exercise for a better result in the exam. You can find other AIIMS Biology Mock Test - 8 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

Which one is a tracheate group

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QUESTION: 2

Adjacent epithelial cells are held together by a mass of

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QUESTION: 3

Feet of king fisher are modified for

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QUESTION: 4

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): The ovary forms fruits after fertilization.
Reason (R): The ovary forms parthenocarpic fruits without fertilization.

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QUESTION: 5

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Samara is a winged achenial fruit.
Reason (R): Wings may or may not develop from its pericarp.

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QUESTION: 6

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Secreting hypotonic urine is effective in reducing urinary loss of water.
Reason(R): Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Solution:

When there is a threat of excessive water loss from the body of the animal then the urine excreted needs to be hypertonic and not hypotonic because excessive water loss from the body possess the threat of a rise in osmoconcentration of blood. Since hypertonic urine is more concentrated and higher in osmotic pressure than the blood, therefore it helps in reducing the loss of water with urine.
Human urine is hypertonic which is more concentrated than the blood.So an isotonic glomeruler filterate is first filtered into the Bowman's capsules of nephrons in kidneys. The tubules of nephrons then reabsorb a large volume of water from the glomerular filtrate not accompained by the reabsorption of proportionate amounts of solutes. This leaves the urine more concentrated than the blood which is very effective in reducing the urinary loss of water.

QUESTION: 7

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Dark period play more important part in flowering than light period.
Reason (R): Flowering occurs in short-day plant if the dark period is interrupted by light break.

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QUESTION: 8

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): A single strand of m-RNA is capable of forming a number of different polypeptide chains.
Reason(R): Termination codons occur in m-RNA.

Solution:

Messenger RNA (mRNA) is a molecule of RNA encoding a chemical "blueprint" for a protein product. mRNA brings instructions from the DNA for the formation of particular type of polypeptide. The instructions are present in the base sequence of its nucleotides. mRNA has methylated region at the 5'terminus. It functions as a cap for attachment with ribosome. Cap is followed by an initiation codon (AUG) either immediately or after a small noncoding region. An mRNA may specify only a singled monocistronic while the latter is known as polycistronic.
Three of the 64 codons are UAG (amber), UAA (ochre) and UGA (opal or umber), they bring about termination of polypeptide chain synthesis and are called termination codons or stop codons.

QUESTION: 9

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Cholorophyll a absorbs 703 nm, 683 nm and 673 nm.
Reason (R): PS I stops if chlorophyll a absorbs only 683 nm wavelength of light.

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QUESTION: 10

In the following questions, a statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the statements carefully and mark the answer-
Assertion (A): Pinosomes and phagosomes are endocytic vesicles.
Reason (R): They are modification of cell membrane.

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QUESTION: 11

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Transport of minerals occurs only in the phloem.
Reason (R): The minerals are first transported to leaves.

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QUESTION: 12

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): In caducous plants, leaves are never formed.
Reason (R): In deciduous plants, all leaves fall together.

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QUESTION: 13

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Cytochromes are a group of a copper-containing electron transferring proteins.
Reason (R): The terminal cytochrome reacts with oxygen.

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QUESTION: 14

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Plants possessing C4- pathway of carbon fixation have a higher net primary productivity than the C3-pathway possessing plants.
Reason(R): For each unit weight of fixed carbon, C4- pathway possessing plants require less water than the C3-pathway possessing plants.

Solution:

C3 plants exclusively fix CO2 via the Calvin Benson pathway. The leaf cells of C4 plants possess two types of chloroplast, bundle sheath cells and mesophyll cells. The mesophyll cells of C4 plants mesophyll cells. The mesophyll cells of C4 plants carboxylase, which catalyses the fixation of CO2 with PEP to form oxaloacetic acid. The bundle sheath cells exhibit high RuBP carboxylase and the other enzymes of the Calvin-Benson cycle. C4 plants are highly productive photosynthetically in view of the low affinity of RuBP carboxylase for its substrate. But CO2 is concentrated as C4 acids due to the activity of the PEP carboxylase, which in effect maintains high pool levels of CO2. C4 plants are related to very high light-harvesting saturation points. C4 plants exhibit low rates of photorespiration only in bundle sheath cells. C4 plants are adapted to high temperature. C4 plants show better utilization of available water but it cannot be the cause of its higher productivity.

QUESTION: 15

Transfer of genetic material in bacteria through virus is termed as 

Solution:

Transduction is the process by which a virus transfers genetic material from one bacterium to another. Viruses called bacteriophages are able to infect bacterial cells and use them as hosts to make more viruses.

QUESTION: 16

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): In bacteria, photosynthesis occurs by utilizing wavelengths longer than 700 nm.
Reason(R): Here the reaction centre is P-890.

Solution:

Bacterial photosynthesis occurs by utilizing wavelengths longer than 700 nm. Here, the reaction centre is P-890 and the reductant is NADH + H+. In bacteria, the donar is hydrogen sulphide or malate or succinate instead of water.

QUESTION: 17

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Diabetes insipidus is marked by excessive urination and too much thirst of water.
Reason(R): Anti-diuretic hormone (ADH) is secreted by the posterior lobe of pituitary gland.

Solution:

Anti-diuretic hormone (ADH) or vasopressin is a peptide hormone, synthesized in the hypothalamus and released by the posterior pituitary gland, that stimulates capillary muscles and reduces the flow of urine and increases its concentration. It is released in response to a fall in the water content of blood plasma and lead to an increase in the permeability to water of the distal and collecting tubules of the nephron. Deficiency or hyposecretion of ADH results in diabetes insipidus.
Diabetes insipidus is characterized by micturating dilute urine several times a dday which results in excessive thirst and dehydration.

QUESTION: 18

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): The age-sex structure of human population in countries like France and Germany gives a steep pyramid.
Reason(R): In countries like Sudan and India the population is increaseing at a rapid rate.

Solution:

The most important demographic characteristic of a population is its age sex structure which is also known as population pyramids. Age sex pyramids display the percentage or actual amount of a population broken down by gender and age. Developed countries with stable population gives a steep pyramid.
The population of Sudan and India are increasing at a rapid rate. The population growth rate for Sudan is 2.60% and for India it is 1.40%.

QUESTION: 19

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Corm is a highly condensed and specialised underground stem.
Reason (R): Corm has circular nodes.

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QUESTION: 20

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): A cholera patient is given glucose, electrolytes and water.
Reason(R): These plasmolyse the disease causing germs.

Solution:

Cholera is an acute infectious disease which is caused by Vibrio cholerae. The stools and the vomit of a cholera patient are full of cholera germs and these may get into a healthy person when contaminated food or drink is taken by mouth.The most important is to give glucose electrolytes and water to replace the lost fluid and salts through stools and vomit.

QUESTION: 21

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Wounds heal slowly due to vitamin C deficiency:
Reason(R): Vitamin C is essential for collagen formation.

Solution:

Main function of Vitamin C is to speed up the healing of wounds . So deficiency of Vitamin C causes the slow healing of wounds. The best characterized function of Vitamin C is the synthesis of collagen connective tissue protein at the level of hydroylation of prolyl and lysyl residues of procollagen. Thus Vitamin C is important for tissue healing.

QUESTION: 22

In food, starch is detected by its

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QUESTION: 23

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Axillary buds, in actively growing herbaceous plants generally remain dormant.
Reason(R): This is due to apical dominance which is under the influence of auxins.

Solution:

The axillary bud is a bud that develops in the axil of a leaf of a plant (synonymous with lateral bud).Apical dominance is the phenomenon whereby the main central stem of the plant is dominant over (i.e., grows more strongly than) other side stems; on a branch the main stem of the branch is further dominant over its own side branchlets.When the apical bud is removed the axillary buds sprout.

QUESTION: 24

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Seeds produced by a large number of plants do not germinate immediately.
Reason (R): Some seeds undergo germination after ripening process.

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QUESTION: 25

In man, blood passes from the post caval into the diastolic right atrium of the heart because of

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QUESTION: 26

End product of glycolysis is

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QUESTION: 27

Castel's intrinsic factor is connected with internal absorption of

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QUESTION: 28

The hereditary material(DNA) present in the bacterium E.coli is :

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QUESTION: 29

Of the following plants which one would you consider an endangered plant due to over exploitation?

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QUESTION: 30

Castor oil is obtained from

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QUESTION: 31

Neurotics (narcotics) are obtained from

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QUESTION: 32

Homo erectus is the scientific name of

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QUESTION: 33

First deciphering of genetic code through trinucleotide synthesis was performed by

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QUESTION: 34

The element of bacterial transformation was discovered by

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QUESTION: 35

Inheritance of skin colour in human beings is an example of

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QUESTION: 36

Sickle cell anaemia is due to

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QUESTION: 37

Cornea transplantation has become common due to

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QUESTION: 38

Immunoglobulin that increases in number during allergy is

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QUESTION: 39

Cells involved in immune mechanism are

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QUESTION: 40

HIV has a protein coat and a genetic material which is

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QUESTION: 41

Bacteria differ from viruses in

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QUESTION: 42

An inflorescence with branched axis is

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QUESTION: 43

Bacteria that convert nitrates into free nitrogen are

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QUESTION: 44

Which one plays an independent role in energy metabolism?

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QUESTION: 45

At a synapse, the neurotransmitters move to the receptor sites by

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QUESTION: 46

The specific function of light energy in the process of photosynthesis is to

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In Photosystem I, light energy activates electrons of the Photosystem II pigments. These pigments transfer the energy of their excited electrons to a special Photosystem II chlorophyll molecule, P680, that absorbs light best in the red region at 680 nanometers.

QUESTION: 47

Sugarcane shows high efficiency of CO₂ fixation because it performs

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QUESTION: 48

Epidermal cells are

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QUESTION: 49

Rubber is obtained from

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QUESTION: 50

Photosynthates are transported through

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QUESTION: 51

BOD (biological oxygen demand) is

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QUESTION: 52

The storage protein is

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QUESTION: 53

The carbon dioxide produced by a developing fetus is removed by the

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QUESTION: 54

Xenia and metaxenia terms are related with

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QUESTION: 55

At the time of fertilization, the chromosome number

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QUESTION: 56

The diaphragm assists breathing by

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QUESTION: 57

RNA contains :

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QUESTION: 58

Muscle that brings the limb towards midline is called

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QUESTION: 59

T.R.Malthus is famous for his book on

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QUESTION: 60

Branch of botany connected with distribution of plants is

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